Electrically controlled motorized typewriter



A. H. BUCKLEY ELECTRICALLY CONTROLLED MOTORIZED TYPEWRITER Filed April 24, 1939 SSheets-Sheet 1 Oct. 7, 1941. A. H. BUCKLEY ELECTRICALLY CONTROLLED MOTORIZED TYPEWRITER Filed April 24, 1959 5 Sheets-Sheet 2 0d. 7, 1941. BUCKLEY I 2,258,405

ELECTRICALLY CONTROLLED MOTORIZED TYPEWRITER Filed April 24, 1939 3 Sheets-Shee t 3 qnnnu DUO ooo, ooooooooooooo HUGE UBO

q onoooogoooooooo o izmsqzfoz Patented o r. 7,1941

UNITED STATES PATENT OFFICE ELECTRICALLY CONTROLLED MOTORIZED TYPEWRITER Arthur H. Buckley, Chicago, Ill.

Application April 24, 1939, Serial No. 269,658

3 Claims. (01.197-20) The invention relates to automatic motorized typewriters.

One object of the invention is to provide improved electrically controlled mechanism for a motorized typewriter in which a relatively narrow tape or record is provided with successive rows of perforations which, through vertically operated switches, are adapted to control the operation of a full set of key-bars and other actions, such as the case-shift, spacers and cartromagnetically controlled switches which, when permutably operated, will control a full set of magnets which control the power-operated devices for selectively shifting. the type-bars and other actions. This makes it possible to individually control the operation of a full set of typebars and other actions from a narrow record with not more than eight rows of perforations.

Another object of the invention is to provide simple and eflicient automatic electrical control mechanism for a motorized typewriter, which is adapted for high speed operation.

Other objects of the invention will appear from the detailed description.

The invention consists in the several novel features which are hereinafter set forth and are more particularly defined by claims at the conclusion hereof.

In the drawings: Fig. 1 is a side elevation, parts being broken away, of a typewriter embodying the invention. Fig. 2 is a detail of one of the power-operable shifting devices for the type-bars and other actions. Fig. 3 is a plan of a portion of the key-bar of the typewriter. Fig. 4 is a section through the tracker-bar. Fig. 5 is a plan of a portion of the tape which is perforated in accordance with the invention. Fig. 6 is a diagram of the electrical connections.

The invention is exemplified as applied to a motorized typewriting machine, which comprises a frame a; a full set of key-levers b for the usual number of type-bars b and associated actions, such as a spacer-bar, shift-lock, tabulator, backspacer, case-shift, and carriage-return; a papercarriage c of usual construction; a driving roll 23 which is driven by an electric motor, as well understood in the art; and a series of devices d, each adapted to be coupled to and uncoupled from roll 23, and to shift, by power, a connection for operating one of the type-bars b or one of the aSSQfJtLQCi actions. Devices d are alterwtelrarra atthe front and in the tear of roll 23 for compactness.

construction known in the art for imparting op- These devices d are alike in construction and may be of any suitable erative strokes to the type-bars from a driving rollin motorized typewriters. The mechanism for driving roll 23 and the construction of the devices d are described in detail in an application filed by me February 23, 1939, Serial No. 257,775,

now Patent No. 2,247,275, issued June 24, 1941, to

which reference may be had for the details thereof. Roll 23 extends laterally across the machine,

to drive the entire set of devices (1 and is suitably journaled in the frame a.

Key-levers b are fulcrumed on a rod which is supported in a member a of the frame a.

Each key-lever is held normally raised by a spring 45 and is provided with a leg b having a slot 43 for a stud 39-on the upper end of the controller-dog 31 for one of the shifting devices d. Depression of the key-levers controls, through dogs 31, the individual operation ofthe devices d.

All of the type-bars b are fulcrumed on a rod b which is supported in a shiftable frame a for upper and lower case printing, as well understood in the art. Each type-bar is operable by an angular lever 33 of one of the shifting deis supported in a member of frame a and comvices d by a connection comprising a toggle-lever 28, the front member of which is pivoted at 28a in frame a and the rear member of which is pivoted to the type-bar; a link 3| pivoted to the rear member of toggle 28; a bell-crank lever 29 levers 33 which is fulcrumed on a rod 34 which prises a horizontally extending arm 33 which is connected to a link 32 and a vertically extending arm 33 A rotatable element 35 with peripheral cam-faces 36 is supported in the lower .end of each lever-arm 33 Cam-faces 36 are normally disengaged from roll 23. Upon a slight rotation of element 35 on its own axis in arm 33', one of its cam-faces 36 will engage roll 23 so the element will be rotated a cycle of one-half revolution to rock lever 33 on its fulcrum 34 to shift its arm 33 for the operation, by power, of a typebar or other device connected to said lever and at the end of said cycle element 35 will be automatically disengaged from the roll 23. .A lever or dog 31-is pivoted in each lever 33 and engages stop-lugs 36 at the end of each cycle to automatically stop the rotation of element 35 at the end of each cycle These devices If exemp if power-operable devices engageable with the drive-roll 23 for imparting strokes to the typebarsa'nd associated actions, which are controlled by the key-levers b.. When a-lever b is depressed,

its legb' will shift the" dog 31 to release rotatable element 35 so it will be driven a cycle of approximately one-half arevolutionvby the engagement of one of the cams 36 with vtheroll. The lever 33 will, during this cycle, shift link 39 and the lever 29 connected thereto, to impart an operative stroke to a type-bar or other action. The. automatic controlling mechanism for shifting the devices at for initiating apower stroke, comprisesa tracker-bar t over which is fed a perforated tape ,1 by a suitable tape feed mechanism which comprisesa feed-sprocket k asupply-spool k for the tape, and a take-up spool k for the tape.

The body of the tracker-bar is formed of 'insu--' lating material and has embedded therein a series of' eight contacts t t t t t t t t, which are insulated from one another and extend to the face of the tracker-barover which the tape 1 is drawn. A conductor-plate s is provided with eight contact-strips s s s s s s, s", and s for engaging, respectively, through the perfora tions in the tape, the contacts in the tracker-bar,

' respectively. Contact-plate s is electrically connected to a battery 11:. The contacts t t t t t i t and t are respectively connected by conductors, 50 to the helices of relay magnets r 1- 1' 1", r 1 r! and 1', respectively, each of which comprises an armature and a switch controlled thereby.

A series of solenoid magnets m is provided, one

for each key-lever b, and the 'armatures of said magnets are respectively connected by links m to said levers, so that when one of said magnets.

ls energized'it will depress'the lever I) connected thereto and shift its leg 1) to couple the associated shifting device 01 into engagement with the driving roll 23.

The tape or record comprises perforations I I. f f 1 1 1", 1' arranged along longitudinal lines with three perforations transversely aligned for each operation. The perforations on each transverse line are differentially arranged for permutative control of the contacts t t t t t t, t", t so that, though the permutative operation of magnets r r 1 ,7 1 1, 1'', r, the en- I tire series of forty-nine magnets m will be controlled for'individual operation of the key-levers b. The armature of magnet r is adapted to operi ate a singl switch h The armature of ma net r is adapted to close "a pair of switches h,

h-'*. The armature of magnet r is adapted to close a-set of fourswitches h", M, 'h, and h". The armature of magnet r is adapted to close a The and h The armature of magnet r is adapted to close a single switch h.

The relay-magnets r to r, inclusive, and their associated switches are disposed at the front of the keyboard, as illustrated in Fig. 1.

The contacts of switches h to h inclusive, .are 'conhected to battery 1:, and to the magnets m, as

diagrammatically illustrated in Fig. 6, so that by the permutable actuation of the magnets r 'to 1 inclusive, each of the key-levers b will be individually controlled-according to the permutathe device d connected to said key.

in the record or tape The permutative arrangement of the perforations in the tape for operating a full set of 43 key-levers of the typewriter is exemplified in Fig, 5. I I

For the'purpose of illustration the tape shown is perforated for controlling the key-levers successively from leftto right, it being understood. that in practice the tape will be perforated in code to reproduceany record desired. The operations' of the key-levers by the tape shown in 'Fig. 5, commencing at the left, will be as folbattery :1: through switches h h magnet m for the first key (usually the shift-lock key) and switch 71. to battery 2: and said key will be depressed by said magnet m to render operative When a set of transversely aligned perforations 1, F, f traverse the tracker-bar, three circuits will be closed at contacts s 1?; s t s t respectively, which will energize magnets 1 r, 1',

h n magnet m for'the next key (usually theshift-key) and switch n to battery :1: and said key will be depressed by-said magnet to render operative the shifting-device d connected to said key.

When a set of transversely aligned perforations f F, f traverse the trac er-bar, three circuits will be closed at contacts s t s, t; s i respectively, to establish circuitswhich will en rgize magnets r r 1' and close switches h h h ,-h to h", inclusive, whereupon current will pass from battery :1: through switches h ,h magnet m for the next key (usually the tabulatorkey) and switch h to battery .1: and said key will bedepressed by said magnet to render oper ative the shifting-device :1 controlled by said key When a set of transversely aligned perforations 1 I, f traverse the trackenbar, three cir- 'cuits will be closed at contacts s t s, t; s, t; respectively, to establish three circuits which will energize magnets r 1', r and close switches h h, h h h h h, h, whereupon current will pass from battery :1: through switches h h magnet m for-the next key (usually for spacing) and switch it to battery :1: and said key will be depressed by said magnet to render operative the device at controlled by said key. I

When a set .of transversely aligned perforations f f, f' traverse the tracker-bar, three circuits will be closed at contacts s t s, t; s", t"; respectively, to establish three circuits which will energize magnets r 1 r and close switches hhJh m, h, 113 whereupon current will pass from battery so through switches n .hF, magnet in for the next key (usually for printing Q) and switch h -to battery :2: and said key will be depressed by said magnet to render operative the shifting device dcontrolledby said key for an operative stroke.

When aset of transversely aligned perforations), 1 f traverse the tracker-bar, three circuits will be closedat contacts s t s, t; s ,-t :respectively, which will energize magnets r 1", r, t

and close switches h h and W; whereupon-current will pass through'switches 1L h magnet.

tions of three of the eight series of perforations m for the next key (usually the key for printin *A") and switch 71 to battery and said key will be depressed by said magnet to render operative shifting-device d for said key. J

When a set of transversely aligned perforations f f 1 traverse the tracker-bar, three circuits will be closed at contacts s t s t it; respectively, which will energize magnets r r 1'' and close switches h h M; 71. h', h 72 h h and it whereupon current will pass through switches h h magnet m for the next key (usually the key for printing 2) and switch h" to battery :1: and said key will be depressed by said magnet to render operative shifting-device d for said key.

When a set of transversely aligned perforations 1 f, f traverse the tracker-bar, three circuits will be closed at contacts 3 t s t s t respectively, which will energize magnetsr r 1' and *close switches h h h5, h h", h, h", 11 h and h", whereupon current will pass through switches 71. 12 magnet m for depressing the next key (usually the key for printing Z) and switch h to battery :0 and said key will be depressed by said magnet to render operative shifting device at for said key.

' When a set of transversely aligned perforations f P, f traverse the tracker-bar, three circuits will be closed at contacts s, t s i respectively, which will energize magnets r r 1 and close switches h1, h h h h h h 'h n and h, whereupon current will pass through switches h h magnet m for the next key (usually the key W) and switch 71. to

battery I and said key will be depressed by said magnet to render operative shifting-device (1 connected to said key.

When a set of transversely aligned perforaf f f traverse the tracker-bar, 'three circuits will be closed at contacts s t s t 8 t respectively, to establish three circuits which will energize magnets r r r and close switches h n h h h", 11 whereupon current will pass from battery 1: through switches h h magnet m for the next key (usually for printing 3) and switch 12 to battery 2: and said key will be depressed by said magnet to render operative the device (1 controlled by said key.

When a set of transversely aligned perforations f f, f traverse the tracker-bar, three circuits will be closed at contacts s t .9, t"; 8 t respectively, to establish three circuits whichwill energize magnets r r 1 and close switches h h, 71., h, h, 72 71. 72. h, h", whereupon current will pass from battery :1: through switches h h", magnet m for the next-key (usually for printing'f x) and switch h 'to battery :1: and said key will be depressed by said magnet to render operative the device it controlled by said key.

When a set of transversely aligned perforatio'ns f I I traverse the tracker-bar, three circuits will be closed at contacts s1, t s t; s i respectively, to establish three circuits which will energize magnets r r*, r and close switches h trolled by s'ai a a m n11 n12 hi8 h19 zo m a n22 whereupon current will pass from battery :c through switches h n magnet m for the next key (usually for printing E) and switch h" to battery x and said key will be depressed by said respectively, to establish three circuits which will" energize magnets r r 1' and close switches h h h h hi n 11., 71. whereupon current will pass from battery :0 through switches h h magnet m for the next key (usually for printing D) and switch n to battery :1: and said key will be depressed by said magnet to render operative the device d controlled by said key.

When a set of transversely aligned perforations f I I traverse the tracker-bar, three circuits will be closed at contacts s t s t .9, t respectively, to establish three circuits which will energize magnets r r 1 and close switches h h", 71. 72 h h, h, whereupon current will pass from battery :1: through switches 71. m

magnet m. for the next key (usually for printing 4) and switchh to battery .1: and said key will be depressed by said magnet to render opercuits will be closed at contacts s t s i s t respectively, to establish three circuits which will energize magnets r r 1 and close switches h n13 n14 n15 n16 hl'l n18 H19 7 20 n21 22 Where upon current will pass from battery :0 through switches h n magnet m, for the next key (usually for printing C) and switch 71. to battery 2: and said key will be depressed by said magnet to render ope ative the shiftingdevice d conkey.

When a set of transversely aligned perforations f I I traverse the tracker-banthree circuits will be closed at contacts s t s t s", t"; re- I spectively, to establish circuits which will energize magnets r r 1' and close switches h ,'h

h h h h 'l, n to it, inclusive, whereupon" current will pass from battery :1: through switches h n magnet m for the next key (usually for printing R) and switch n to battery 1: and said key will be depressed by said magnet to render operative the shifting device d controlled by said key. a

When a set of transversely aligned perforations 1 f 1 traverse the tracker-bar three circuits will be closed at contacts .9 t; 5 t s t respectively to establish circuits which-will energize magnets r r 18 and close switches n n h, 11 h h", h, whereupon current will pass' from battery at through switches h 71. magnet m for the next key (usually for printing F) and switch h to battery :2: and said key will be depressed by said magnet to render operative tery a: and said key will be depressed by said magnet to'rend'er cperative the shifting device a controlled by said key.

When a set of transversely aligned perforations f f, f traverse the tracker-bar, three circuits will be closed at contacts 8 t s, t t-s t respectively, to establish three circuits which will energize magnets r r 1 and close switches tions f f, f traverse the tracker-bar, three circuits will be closed at contacts s*, t .9, 13 8 t respectively, to establish three circuits which I will energize magnets r r r and close switches h, 71. h to h", inclusive, whereupon current will pass from battery as through switches h 72., magnet m which is connected to the next key (usually for printing T") and switch h) to battery :1: and said key will be depressed by said magnet to render operative the shifting device 11 controlled by said key.

When a set of transversely aligned perfora-t tions f, f, f traverse the tracker-bar three circuits will be closed at contacts s, t; s t s t respectively, to establish three circuits which will energize magnets r", 1' 1' and close switches h? to h", inclusive, h to h", inclusive, whereupon current will pass from battery .1: through switches h, h, magnet m which is connected to the next key (usually for printing G) and switch h f to battery a: and said key will be depressed by said magnet to render operative the shifting device at controlled by said key.

When a set elf-transversely aligned perforations 1', I I traverse the tracker-bar, three circuits will be closed at contacts s, t; s t s, t; respectively, to establish three circuits which will energize magnets r r 1 and close switches tions 1 ,1 1 traverse the tracker-bar. three c'ircuits will be closed atcontacts s s, t; '3 t respectively, to establish three circuits which will energize magnets r r, r and close switches h, h h to h", inclusive, whereupon .cu-rrent will pass from battery :2 through switches h, h magnet m-which is connected to the next key (usually for printing 7) and switch 1;" to battery :1: and saidkey. will be depressed by said magnet to render operative the shifting device at controlled by said key.

When a set of transversely aligned perforationsj, f, f traverse the tracker-bar, three circuits will be closed at contacts 8*, t s t s", t"; respectively, to establish three circuits which will energize magnets r, r, r and close switches h, 72. it to h inclusive, and h to h", inclusive, whereupon current will pass from battery 1: through switches h, It, magnet m'which is connected to the next key (usually for printing N) and switch h tobattery a: and said key will be depressed by said magnet to render operative the shifting device d controlled by said key.

When a set of transversely aligned perforations f, 1 f traverse the .tracker bar, three circuits will be closed at contacts sit; 8 t .9", t"; respectively, to establish three circuits which will energize magnets 1, r 1' and close switches 11, n h to h, inclusive, h? to h, inclusive, whereupon current will bass from battery 1:-

through switches h h magnet m which is connected to the nextkey (usually for printing. U")

and switch h to battery rand said key will be i will be closed at contacts s t=; s t ;'s t respectivelyf to establish .three circuits which will energize magnets r r 1' and close switches 1 h, k h to h, inclusive, whereupon current will pass from battery :1: through switches h, 71.

- magnet ,m which is connected to the next key h to h", inclusive, h to h, inclusive, whereupon current will pass from battery :1: through switches h, h", magnet m which is connected to the next key (usually for printing 6) and switch It to battery a: and said key will be depressed by said magnet to render operative the shifting device (1 controlled by said key. I

Whena set of transversely aligned perforations f f traverse the tracker-bar, three circuits will be closed at contacts s, t; s t; 81', t"; respectively, to establish three circuits which will energize mag'nets 1 ,13, r" and close switches hF, h h h, h, h", h, h, whereupon current will pass from battery :2: through switches h, h", magnet m which is connected to the next key (usually for printing B) and switch h to battery :c and said key will be depressed by said magnet to render operative the shifting device d controlled by. said key.

' When a set of transversely aligned perforations 1, f fltraverse thetracker-bar, three circuits will be closed at contacts .9, t; s t .9, t respectively, to establish three circuits which will tions f, 1 f traverse the tracker-bar, three circuits will be closed at contacts s t; s, t s, t; respectivelm'to establish three circuits .which will energize magnets 1", r 1', and close switches 12", a h, h, h" whereupon current will pass from battery :2 through switches h, h, a magnet m which is connected to the next key (usually forprinting 8) andswit'ch h to battery a: and said key will be depressed by said magnet to render operative the shifting device :1? controlled energize magnets r r 1'? and close switches energize magnets r, r 1 and close switches h,

h h to h", inclusive, and i1 whereupon curh, h-*,; h to h", inclusive, h, and h, whereupon current will pass from battery :1: through switches-h, h f; magnet m which is connected to the next key (usually for printing ll/i) and switch It to battery :1: and said key ,will be depressed by said magnet to render operative the respectively, to establish three circuits which will I energize magnets r, r, r", and close switches h", h, h to h", inclusive, and h whereupon current will pass from battery :1: through switches h, h, magnet m which is connected to the next key (usually for printing I) and switch h to battery 2: and said key will be depressed by said magnet to render operative the shifting device d controlled by said key.

When a set of transversely aligned perforations f", 7 f traverse the tracker-bar, three circuits will-be'closed at contacts .9, t s, t; s", t'; respectively, to establish circuits which will energize magnets r r 1'' and close switches h m, h to n inclusive, whereupon current will pass from battery m through switches 71. h, magnet m for the next key (usually for printing -K) and switch 21. to'battery :c and said key will be depressed by said magnet to render operative the shifting device d controlled by said key.

When a set of transversely aligned perforations f3, f'*, f traverse the tracker-bar, three cir- -cuits will be closed at contacts s t s i s, t;

respectively, to establish three circuits which will energize magnets r r T and close switches h 71 h to h, inclusive, and 71. whereupon current ,will pass frombattery a: through switches h n magnet m which is connected to the next key (usually for printing 9) and switch h to battery as and said key will be depressed by said magnet to render operativethe shifting de-- vice d controlled bysaid key.

When a set of transversely aligned perforations f ,f f traverse the tracker-bar, three circuits will be closed at contacts s i s s t respectively, to establish three circuits which will energize magnets r 1*, 1- and close switches h to h ",in'clusive, whereupon current will pass from battery :1; through switches 71 h, magnet m which is connected to the next key (usually for printing a comma) and switch h" to battery .1: and said key will be depressed by said magnet to render operative the shifting device (1 controlled by said key.

When a set of transversely aligned perforations f f 1 traverse the tracker-bar, three circuits will be closed at contacts s t s t s i respectively, to establish three circuits which will energize magnets r r T and close switches 71/ to h inclusive, and h to h, inclusive, whereupon the current will pass from battery a: through switches M, 71. magnet m which is connected to the next key (usually for printing "0) and switch it to battery 9: and said key will be depressed by said magnet to render operative the shifting device (1 controlled by said key. When a set of transversely aligned perforations f f, f traverse the tracker-bar, three cir cuits will be closed at contacts s t s t s", t"; respectively, to establish three circuits which will energize magnets r r 1' and close switches k to. it, inclusive, h. and h, whereupon the current will pass from battery a: through switches h h magnet m which is connected to the next key (usually for printing L) and switch h to battery :1: and said key will bedepressed by said magnet to render operative the shifting device d controlled by said key.

When a set of transversely aligned perforations f f, f traverse the tracker-bar, three circuits will be closed at contacts s F; s, t s i respectively, to establish three circuits which will energize magnets T 1'", T and close switches h to h", inclusive, and 71. whereupon the current will pass from battery :1: through switches h h ,,magnet m which is connected to the next key (usually for printing zero) and switch 11 to battery :1: and said key will be depressed by said magnet to render operative the shifting device d controlledby said key. I

When a set of transversely aligned perforations f 1 f traverse the tracker-bar, three circuits will be closed at contacts s t s t 5, t respectively, to establish three circuits which will energize magnets 1' 135, 1' and close switches 71. to h", inclusive, and h to h", inclusive, whereupon the current will pass from battery a through switches 71 71. magnet m which is connected to the next key (usually for printing a period) and switch it to battery :1; and said key will be depressed by said magnet to render operative the shifting device d controlled by said key.

When a set of transversely aligned perforations f i f' traverse the tracker-bar, three circuits will be closed at contacts s t s t s", t"; respectively, to establish three circuits which will energize magnets r r r", and close switches h* to h", inclusive, h to h", inclusive, n and h, whereupon the current will pass from battery :1: throughswitches k h magnet m which is connected to the next key (usually for printing P] and switch it to battery :1: and said key will be.-

depressed by said magnet to render operative the shifting device (1 controlled by said key.

When a set of transversely aligned perforations f f f traverse the tracker-bar, three circuits will be closed at contacts s t s t s t respectively, to establish three circuits which will energize magnets 1 T5, 1' and close switches h to M, inclusive, h to 71.", inclusive, and h, whereupon current will pass from battery in through switches h, 71 magnet m which is connected to the next key (usually for printing a semicolon) and switch it to battery 37 and said key will bedepressedby said magnet to render operative the shifting device it controlled by said key for an operative stroke.

When a set of transversely aligned perfora tions f f 1" traverse the tracker-bar, three circuits will be closed at contacts 8 s", t'{; respectively, to establish three circuits which will energize magnets 1' r, r and close switches 71 to h', inclusive, 7:. to h, inclusive, whereupon current will pass from battery through switches h, h, magnet m which is connected to the next key (usually for printing a hyphen) and switch h to battery .7: and said key will be depressed by saidmagnet to render operative the shifting device dcontrolled by said key.

When a set of transversely aligned perforations F, f', I -traverse the tracker-bar, three circuits will be closed at contacts s t .9, t s t respectively, to establish three circuits which will energize magnets r r, f and close switches n to h", inclusive, h to h, inclusive, n whereupon'current will pass from battery x through switches 71. m magnet m which is connected to the next key (usually for printing and switch 71. to battery :0 and said key will be depressed-by said magnet to render operative the shifting device d controlled by said key.

When a set of transversely aligned perforations f 1, f traverse the tracker-bar, three circuits will be closed at contacts s t s', t"; s i respectively, to establish circuits which will energize magnets 1 81'", r and-close switches 71 to h", inclusive,.h to It, inclusive, whereupon current will pass from battery :1: through switches h n magnet m for the next key (usually for printing and switch It to battery 2:

' and said key wilibe depressed by said magnet to render operative the shifting device (1 controlled by said key. When a set of transversely aligned perforations f f 1 traverse the tracker-bar, three cir- 'cuits will be, closed at s, t sits,- t*; re-

spectively, to establish circuits which will energize magnets r r 1 and close switches h to h inclusive, whereupon current will pass from loattery in through switches h h ,'magnet m for the next key (usually for, printing an apostrophe) and switch h? to battery :1: and said key will be cle pressed by said magnet to render operative the shifting device (1 controlled by said key. When a set of transversely aligned perforations f i f traverse the tracker-bar, three circuits will be closed at contacts s t 's, t"; s",

t"; respectively, to establish circuits which will energize magnets r r r and close switches h to It", inclusive, h, h, whereuponlcurrent will pass from battery through switches h, h, magnet m for the next key (usually the stopkey) and switch h to battery :1: and said key will be depressed by said magnet to render operative the shifting device d controlled by said key.

When a set of transversely aligned .perforations f f 1 traverse the tracker-bar, three circults will be closed at contacts s, t; s E; s, t; respectively, to establish circuits which will energize magnets r r 1,,- and close switches h netic switches which,inturn, ind1v1 duauy control the full set of 49'motor-operated shifting devices for imparting power strokes to the type-levers and other actions, and is adapted for speedy and accurate power-operation of the typewriter.

The invention is not to be understood as restricted to the detailsset forth, since these may be modified within the scope of the appendedclaims, without departing from the spirit and scope of the invention.

Having thus described the invention. what I claim as new and desire to secure by Letters Pat-' ent 1st 1. In automatic control mechanism for a motorized typewriter, the combination of a full set of electromagnetic devices for individually controlling the operations of substantially all of the functional parts of the typewriter, a record provided with successive permutations of groups of at least three perforationsior controlling. said parts, a series of eight permutably operable electromagnets, a series "of eight switching devices controlled by the magnets, respectively, and-comprising switches connected' to establish circuits for the individual operation of the full setof electromagnetic devices, and means controlled by to h", inclusive, h", whereuponcurrent will pass from battery :1: through switches h hi, magnet m for the next key (usually forback-spacing) and switch h to battery ,1: and said key will be depressed by said magnet to render operative the shifting device 11 controlled by said key.

, When a set of transversely aligned perforations 1 1, 1' traverse the tracker bar', three circuits will be closed at contacts 8 t .9, t; s", t";

respectively, to establish circuits which will en ergize magnets r, r, r and close switches h to n inclusive, h" to h, inclusive, whereupon current will pass from battery :1: through switches h, h", magnet m for the next key-(usually the right-hand shift-key) and switch h to battery a: and said key will be depressed by said mag- .turn) and switch h" to battery :2: and said key will be depressed by said magnet to render operative the shifting device (1 controlled by saidrkey.

)When the tape between the perforations passes over the contacts in the tracker-bar, the circuits for operating the magnets r to r inclusive. will interrupted and the key-levers b will be restored .to normal position.

The keys I) may be operated manually at any time to control the power operation of the typebars and other actions because the keys are free to be depressed when the magnets m are de-energized and ,through their legs 17 control the shifting devices d.

The invention exemplifies automatic control mechanism for a motorized typewriter, by means of which permutatively arranged sets of three perforations controla set of eight electromagthe groups of perforations in the record for controlling the operation of the magnets in a sumcient number of permutations of three to control the switches controlled by the magnets forindividually and selectively controlling the operation of the full set of electromagneticdevices.

2. In automatic control mechanism for a mo;-

torized typewriter, the combination of a full set of electromagnetic devices for individually controlling the' operations of substantially all of the functional parts of the typewriter, a recordprovided with successive permutations of groups of at least three perforations for controlling said parts, a series of eight permutably operable electromagnets, a series of eight switching devices controlled by the magnets, respectively, and comprising switches connected to establish circuits for the individual operation of the full set of electromagnetic devices, and a set of switches controlled by the groups of perforations in the record for controlling the operation of the mag nts in a sufllcient number of permutations of thre to control the switches controlled by the magnets for individually and selectively controlling the operation of the full set of electromagnetic devices.

3. In automatic control mechanism for a niotorized typewriter, the combination of a full set of electromagnetic devices for individually controlling the operations of substantiailly. all of the functional parts of the typewriter, a record provided with successive permutations of groups of at least three perforations for controlling said parts, a series of eight permutably operable electromagnets, aseries of eight switching devices controlled by the magnets, respectively, and comprising switches connected to establish circuits for the' individual operation of the full set of electromagnetic devices, and a set of eight switches controlled by the groups of perforations in the record for controlling the operation of the magnets in a'sufllcient number of permutations of three to control the switches controlled by the magnets for individually and selectively controlling the operation of'the full set of electromagnetic devices. q ARTHUR H. BUCKLEY. 

